Clement Clarke A2A Spacer Universal A2A Spacer is a pocket sized, valved holding chamber (VHC); collapsible for improved portability. A2A Spacer is made from anti-microbial, low-static, transparent plastic for improved hygiene; for single patient use. When open A2A has a volume of 210ml, when closed it is highly portable. Product Features and Benefits: • Collapsible, pocket sized, VHC • Easy to clean • Inhibits microbial growth • Low-static properties • Visible valve movement • Without mask